1
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Rate of a first order reaction is $1.5 \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$ minute ${ }^{-1}$ at 0.5 M concentration of reactant, calculate half life of reaction.

A
0.383 minute
B
7.53 minute
C
8.73 minute
D
23.1 minute
2
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the density of a metal molar mass $197 \mathrm{~g} \mathrm{~mol}^{-1}$ if it forms fcc structure. $\left[\mathrm{a}^3 \times \mathrm{N}_{\mathrm{A}}=40 \mathrm{~cm}^3 \mathrm{~mol}^{-1}\right]$

A
$23.5 \mathrm{~g} \mathrm{~cm}^{-3}$
B
$21.2 \mathrm{~g} \mathrm{~cm}^{-3}$
C
$17.5 \mathrm{~g} \mathrm{~cm}^{-3}$
D
$19.7 \mathrm{~g} \mathrm{~cm}^{-3}$
3
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A gas expands isothermally against a constant external pressure of 1 bar from 10 dm$^3$ to 20 dm$^3$ by absorbing 800 J of heat from surrounding. Calculate value of $\Delta$U.

A
100 J
B
$-$200 J
C
200 J
D
$-$300 J
4
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which from following decides the rate of multistep reaction?

A
rate of slowest step.
B
rate of fastest step.
C
average rate of various steps.
D
instantaneous rate of fast step.
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